APM32F103RBT7-R datasheet(52/78 Pages) GEEHY

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Table40 USBD Full-speed Electrical Characteristics (VDD=3.0~3.6V, TA =25℃)

Symbol

Parameter

Condition

Minimum

value

Maximum

value

Unit

Rise time

CL = 50pF

Fall time

CL = 50pF

trfm

Match of rise and fall

time

tr / tf

110

VCRS

Output signal crossover

voltage

1.3

2.0

5.12

Analog peripherals

5.12.1 ADC

Test parameter description:



Sampling rate: The number of conversion of analog quantity to digital quantity by ADC

per second



Sample rate=ADC clock/(number of sampling periods + number of conversion periods)

5.12.1.1 12-bit ADC characteristics

Table41 Characteristics of 12-bit ADC (VDD =2.4~3.6V, TA =-40~105℃)

Symbol

Parameter

Condition

Minimum

value

Typical

value

Maximu

m value

Unit

VDDA

Supply voltage

2.4

3.6

VREF+

Positive reference voltage

2.4

VDDA

IVREF

Current on VREF input pin

260

484

μA

fADC

ADC clock frequency

0.6

MHz

Sampling rate

0.05

MHz

VAIN

Conversion voltage range

VREF+

tCAL

Calibration time

fADC = 14MHz

5.9

μs

1/fADC

RADC

Sampling resistor

kΩ

CADC

Sample and hold capacitance

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